Fifty-five years ago, the world was vastly different. The human population was seventy percent larger, animals – not monsters – prowled the forests, and only one moon hung in the sky. Oh, and people didn't have superhuman powers.

It sounds like an old wives tale.

Now we've clawed our way back from near extinction, but the worldwide territory battle against monsters still rages. Some people hope lost knowledge from the past will improve our circumstances. Others think newly developed sciences will shape the future.

As for me? I'm stuck in my own past. I thought moving to the city of my trauma would help me heal. I thought becoming a Hunter would prove I was strong enough to be worth something. Anything.

Maybe … I thought wrong. I'm simply not strong enough.

But now I'd gained a mysterious System that enhances my physique with each level – just like a video game. Every level draws me deeper and deeper into the secrets that suddenly rule my life. What does the System want? What secrets does it know about me? Is it connected to the overpowered, unidentified monsters that keep appearing?

All I know is in the middle of the mystery was Terre Noble, a powerful Hunter with too many secrets of his own.